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T1000734-v4

T1000734-v4. FEA of FM / BS applied to 5 chambers WBSC2, WBSC4, LBSC2 WBSC7 and WBSC8 Refer to the other pdf associated with this DCC number with proposed layouts for difference and similarities between these chambers. Calum Torrie, Tim MacDonald, Kurt Buckland, Norna Robertson.

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T1000734-v4

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  1. T1000734-v4 FEA of FM / BS applied to 5 chambers WBSC2, WBSC4, LBSC2 WBSC7 and WBSC8 Refer to the other pdf associated with this DCC number with proposed layouts for difference and similarities between these chambers Calum Torrie, Tim MacDonald, Kurt Buckland, Norna Robertson T1000734-v4 March 3rd 2011

  2. Original struts versus Lab struts and BSC8 proposed struts Original struts Lab struts BSC8 Both original strut and lab struts have been looked at in the lab and although lower in freq than FEA results below they are comparable to each other as per the 2 results below This set has not been modelled in the lab 1) f1=109 Hz (FMBS with RAL original struts + 8kg non-sus mass) 2) f1=124 Hz (FMBS with RAL original struts + no non-sus mass) 5) f1 = 113 Hz (FMBS with lab struts struts + 8kg non-sus mass) 6) f1 = 127 Hz (FMBS with lab struts + no non-sus mass) 3) f1 = 84 Hz (FMBS with modified RAL struts (BSC8) + 8kg non-sus mass) 4) f1 = 93 Hz (FMBS with modified RAL struts (BSC8) + no non-sus mass) Cf 75 Hz in lab Cf 89 Hz in lab T1000734-v4

  3. Further cases in FEA (for BSC8) • Possible BSC8 layout with non sus mass • f1 = 96 Hz • Possible BSC8 layout with non sus mass • f1 = 111 Hz • Possible BSC8 layout with non sus mass and 14 deg angle struts this one fits in the chamber • f1 = 106 Hz T1000734-v4

  4. Windows in the face plates • Running several different cases we only observed a change in frequency of the order 1 Hz (reduction) with the addition of windows as shown T1000734-v4

  5. BSC 2 again 1) f1=109 Hz (FMBS with RAL original struts + 8kg non-sus mass) 2) f1=124 Hz (FMBS with RAL original struts + no non-sus mass) 5) f1 = 113 Hz (FMBS with lab struts struts + 8kg non-sus mass) 6) f1 = 127 Hz (FMBS with lab struts + no non-sus mass) 7) f1 = 110 Hz (FMBS with 4 short struts struts + 8kg non-sus mass) NEED TO LOOK AT BSC2L, BSC4H and BSC2H again … T1000734-v4

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